To make the dough, place the warm water and sugar in the bowl of a stand mixer. Sprinkle the yeast on top and let bloom, about 10 minutes.
Add the flour, olive oil, and salt to the yeast mixture and turn the mixer (fitted with the dough hook) to medium. Knead until the dough comes together to form a smooth dough. You may need to add more flour, a few tablespoons at a time, until the dough comes together. Remove dough to an oiled bowl and place in the oven with the light turned on.
Let rise for one hour, or until doubled in bulk.
Set the oven to 500 degrees after the dough has risen for about 30 minutes.
When the dough has doubled, punch it down.
Roll the dough out on a well floured surface to a 12 inch circle and place on a pizza stone or pan.
Microwave the cream cheese until very soft and melty. Stir the ranch seasoning into the cream cheese to combine.
Spread the cream cheese mixture over the crust evenly.
Sprinkle all but 1/4 cup of the cheese over the crust.
Toss the chicken with the hot sauce to coat and spread the chicken evenly over the cheese.
Top with the remaining cheese.
Bake for 10 minutes or until the dough is golden and the cheese has melted.
Sprinkle with green onions and drizzle ranch or blue cheese dressing over the pizza before serving, if desired.